Marvel fans are nothing if not a loyal bunch, something they proved this past weekend when "Avengers: Infinity War" broke all kinds of box office records. Now, the film studio is thanking those fans for their unwavering support.

In a heartfelt letter shared on social media, Marvel Studios chief Kevin Feige reflected on the 10th anniversary of the Marvel Cinematic Universe, and praised the entire Marvel team, the cast and crew of all the MCU films, and the comic book creators who shepherded their iconic characters. But Feige saved his biggest shout-out for the fans.

"Thank you for embracing these characters and stories since we kicked off the MCU ten years ago," the exec's letter said. "This past weekend was beyond our wildest dreams. ... [T]hank you for being the best fans in the universe and making Avengers: Infinity War the biggest opening weekend of all time."

"Infinity War" raked in a jaw-dropping $630 million worldwide in its opening frame, including a $250 million domestic haul that topped previous champ "Star Wars: The Force Awakens," which pulled in $248 million in 2015. With little competition standing in its way right now, it should easily earn another huge pile of cash this coming weekend, too.

The sky is truly the limit for the MCU, and with plenty more movies on the horizon, the studio should have multiple opportunities to top itself in the coming years. Feige may want to keep his stationery handy.